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REPAIR OF THE CENTOVALLI RAILWAY TUNNEL

INSTANDSTELLUNG DER CENTOVALLI-BAHNTUNNEL

Between 1969 and 1974, ten tunnels on the Swiss section of the Locarno-Domodossola railway were repaired using shotcrete. The report includes an introduction (containing details of the significance, construction, setting out, operation and repair of railway lines) and chapters on geology and geotechnics (with comments on the causes of the damage), the condition before the repairs (description of the types of damage), the operation, the results of the repair measures and the cost. The section dealing with the operation includes details of the plant and materials used to carry out the work, the personnel required and the time involved. The use of shotcrete had the effect of consolidating masonry and rock, sealing the masonry, correcting the tunnel profile and reinforcing the tunnel lining.